img {
	width: 100%;
	height: 100%;
}


html,
body {
	width: 100%;
	height: 100%;
	overflow: hidden;
}

.header {
	height: 8vh;
	background: url(../images/christmas.jpg) no-repeat left center;
	background-size: 1rem 8vh;
	text-align: center;
}

.header-img {
	width: 50%;
	height: 100%;
}